JP2016037259A - Seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat slide device capable of decreasing the number of components managed by a manufacturer by sharing components.SOLUTION: The entire length of a slider 31 is set to be half the entire length of a lower rail 10 or less, being a pair arranged to and fro from a front end side of a vehicle and a rear end side of a vehicle of the lower rail 10, with a protector 32 formed integrally on one end side corresponding to an end part side of the lower rail 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a seat slide device capable of moving a seat in the front-rear direction and fixing the seat at a position desired by a seated person.

  The seat slide device includes a lower rail that is fixed to the vehicle body, an upper rail that is fixed to the lower surface of the seat, and a friction reduction unit that reduces friction when the upper rail moves on the lower rail.

  In the seat slide device shown in Patent Document 1, a resin slider made of a resin material extending along the longitudinal direction of the rail is widely used as a friction reducing means.

  Moreover, in the seat slide apparatus shown by patent document 2, in order to protect a seated person from a lower rail end surface, the protector is mounted | worn so that an edge part may be covered at the both ends of a lower rail.

Japanese Utility Model Publication No. 1-73430 JP 2010-89689 A

  By the way, in the technique described in Patent Document 1, since the resin slider is arranged over the entire length of the lower rail, resin sliders having various dimensions must be prepared in accordance with the entire length of the lower rail. This increases the number of parts to be managed.

  Further, even in the technique described in Patent Document 2, the number of parts is increased due to the configuration in which protectors are attached to both ends of the lower rail.

  In view of the above circumstances, an object of the present invention is to provide a seat slide device that can reduce the number of parts managed by a manufacturer by sharing parts.

  According to a first aspect of the present invention, there is provided a lower rail extending along the longitudinal direction of the vehicle, an upper rail movably assembled on the lower rail along the longitudinal direction of the lower rail, the lower rail, and the upper rail. And a protector that covers the end surface of the lower rail, and the slider is formed with a length of 1/2 or less in the longitudinal direction of the lower rail. A pair of front and rear are arranged from the vehicle front end side and the vehicle rear end side of the lower rail, and the protector is integrally formed on one end side corresponding to the end side of the lower rail.

  According to a second aspect of the present invention, in the seat slide device according to the first aspect, a fitting portion protruding toward the side wall surface side of the lower rail on the other end side of the slider, and the lower rail facing the fitting portion It is characterized in that the side wall surface is provided with a fitting receiving portion that can be fitted with the fitting portion.

  According to a third aspect of the present invention, in the seat slide device according to the first or second aspect, the lower rail has a lower bottom wall having a rectangular shape extending in the vehicle front-rear direction, and a vehicle width direction of the lower bottom wall The lower side wall which stands up from the lower end arc part constituted by the arc surface from both end edges of the lower wall and the lower upper arc part constituted by the arc surface from the upper end edge of both the lower side walls are opposed to each other A lower upper wall that extends substantially parallel to the lower bottom wall toward the lower side wall, and a lower inner wall that hangs downward from an inner edge of the lower upper wall. An upper ceiling wall having an extending rectangular shape, an upper side wall that hangs downward from both end edges in the vehicle width direction of the upper ceiling wall, and an upper lower oblique wall that stands obliquely upward and outward from the lower end edge of the upper side wall; , The upper downward slant An upper upper inclined wall standing obliquely upward from the upper edge of the upper edge toward the upper side wall, and the slider is between the lower lower arc portion and the upper lower inclined wall, and the lower upper arc portion. A lower cylindrical portion that is disposed between the lower upper inclined wall and is disposed along a longitudinal direction between the lower lower circular wall portion and the upper lower inclined wall; and the lower upper circular arc portion And an upper cylindrical portion made of a cylindrical member disposed along the longitudinal direction between the upper inclined wall and the upper upper inclined wall, and a connecting portion connecting the upper cylindrical portion and the lower cylindrical portion. The lower side wall, the lower lower circular arc part, and a part of the lower bottom wall are formed so as to cover at least.

  The slider according to claim 1, wherein the slider is formed to be shorter than half of the length of the lower rail in the longitudinal direction, and is arranged in a pair of front and rear from the vehicle front end side and the vehicle rear end side of the lower rail and corresponds to the end side of the lower rail. By integrally forming a protector on one end side of each, it can be applied to various lower rails. As a result, various types of lower rails can be handled with a single type of slider, and parts can be shared.

  Also, by constructing the slider from the vehicle front end side and the vehicle rear end side of the lower rail, unlike the configuration of assembling the slider over the entire length of the conventional lower rail, the slider is less likely to be caught on the way, etc. Assemblability is improved.

  Furthermore, since the protector is integrally formed on one end side of the slider, it is not necessary to provide a protector separately, so that the number of parts can be reduced. Moreover, since the process of assembling the protector separately from the slider is reduced, the assemblability is further improved.

  In the invention of claim 2, the other end side of the slider can be securely fixed to the lower rail by fitting the fitting portion provided on the other end side of the slider with the fitting receiving portion of the lower rail. Thereby, even when the upper rail moves from the position where the sliding contact with the slider is reduced, it is possible to prevent the generation of abnormal noise from the other end side of the slider.

  In the invention of claim 3, by covering the protector with a part of the lower bottom wall of the lower rail, the lower lower arc portion, and the lower bottom wall, the seated person can be protected from the end surface of the lower rail.

It is a disassembled perspective view which shows 1st embodiment of this invention. 1 is a side view of an assembly according to a first embodiment of the present invention. It is a perspective view which shows a set of friction reduction means. FIG. 6A is a schematic view of an assembly showing how the upper rail slides on the lower rail. FIG. 5A shows a state in which the friction reducing means is arranged on the lower rail having the longest length, and the upper rail is positioned on the front side of the vehicle. Is a state where the friction reducing means is arranged on the lower rail having the longest length, and the upper rail is located on the rear side of the vehicle, and (c) is a means for arranging the friction reducing means on the lower rail having the shortest length, and the upper rail is located on the front side of the vehicle. (D) shows a state in which the friction reducing means is arranged on the lower rail having the shortest overall length and the upper rail is located on the vehicle rear side.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, the present embodiment is an electric seat slide device 1 using a motor 41 as a drive source. In addition, the seat slide device 1 of the present embodiment is installed on the floor surface of the vehicle, and is installed on the lower rail 10 that extends along the vehicle front-rear direction and on the back surface of the seat seat (not shown). 10 along the longitudinal direction of the lower rail 10, the upper rail 20 movably assembled in the lower rail 10, the friction reducing means 30 disposed between the lower rail 10 and the upper rail 20, and the upper by the operation of the seated person Drive means 40 for moving the rail 20 to a position desired by the seated person. An assembly 1a in which the upper rail 20 and the friction reducing means 30 are incorporated in the lower rail 10 is disposed in parallel along the vehicle front-rear direction between the seat seat and the floor, and these assemblies 1a are They are linked by the driving means 40.

  The lower rail 10 includes a lower bottom wall 11a having a rectangular plate shape extending in the vehicle front-rear direction, and a pair of lower walls standing upward from both end edges in the vehicle width direction of the lower bottom wall 11a as side wall surfaces of the lower rail 10. Side walls 11b, a pair of lower upper walls 11c extending substantially parallel to the lower bottom wall 11a from the upper edge of both lower side walls 11b toward the opposed lower side walls 11b, and the inner walls of the lower upper walls 11c It consists of a pair of lower inner walls 11d that hang downward from the edge toward the lower bottom wall 11a. In addition, the space | interval between the lower inner walls 11d which oppose in parallel is set so that the upper rail 20 accommodated in the lower rail 10 can move.

  Moreover, the lower bottom wall 11a and each lower side wall 11b are smoothly continued by the lower lower circular arc part 11e comprised by a circular arc surface. Each lower side wall 11b and each lower upper wall 11c are also smoothly continuous by a lower upper arc portion 11f formed by an arc surface. And the lower bottom wall 11a comprises the bottom part of the lower rail 10, and is fixed on the floor surface of a vehicle via a lower volt | bolt (not shown) as a lower fixing | fixed part at the time of fixing on a vehicle floor surface.

  The dimensions of each part of the lower rail 10 are set so that the cross-sectional shape thereof is line symmetric with respect to the symmetry axis X orthogonal to the lower bottom wall 11a. Since the cross-sectional shape of the lower rail 10 is line symmetric with respect to the symmetry axis X, the end surface shape of the lower rail front end and the end surface shape of the lower rail rear end are the same shape.

  In addition, the seat slide apparatus 1 differs in the required slide amount depending on the vehicle type and specification of the mounted vehicle, and the total length of the lower rail 10 is set according to the slide amount. For this reason, the manufacturer manages a plurality of types of lower rails 10 having the same cross-sectional shape and different overall lengths.

  The upper rail 20 includes an upper top wall 21a having a rectangular plate shape extending in the longitudinal direction of the vehicle body, an upper side wall 21b that hangs downward from both edges in the vehicle width direction of the upper top wall 21a, and lower end edges of both upper side walls 21b. The upper lower inclined wall 21c erected obliquely upward from the outer side, and the upper upper inclined wall 21d erected obliquely upward from the upper end edge of each upper lower oblique wall 21c toward each upper side wall 21b. Yes. Further, the upper ceiling wall 21a is fixed to the back side of the seat seat via an upper bolt (not shown) or the like as an upper fixing portion for fixing to the back side of the seat seat.

  In addition, the dimensions of each part of the upper rail 20 are set so that the upper lower inclined wall 21c and the upper upper inclined wall 21d are arranged so as to be movable in the lower rail 10 along the vehicle front-rear direction.

  The friction reducing means 30 includes a slider 31 and a protector 32 that are integrally formed by injection molding a resin material. The friction reducing means 30 of the present embodiment includes a right member 30R disposed along the right lower side wall 11b in FIG. 2 and a left member 30L disposed along the left lower side wall 11b. Yes. In the right member 30R and the left member 30L, the right slider 31R and the left slider 31L as the slider 31, the right protector 32R and the left protector 32L as the protector 32 are integrally formed, respectively.

  As shown in FIGS. 2 and 3, the slider 31 (the right slider 31 </ b> R and the left slider 31 </ b> L) includes a lower cylindrical portion 34 made of a cylindrical member and an upper cylindrical portion made of a cylindrical member having a smaller diameter than the lower cylindrical portion 34. 35. The lower cylindrical portion 34 is disposed along the longitudinal direction between the lower lower arc portion 11e and the upper lower inclined wall 21c, and the upper cylindrical portion 35 is disposed between the lower upper arc portion 11f and the upper upper inclined wall 21d. Arranged along the longitudinal direction. The lower cylindrical portion 34 is formed with a plurality of friction-reducing recesses 36 that are recessed so as to be separated from the upper lower inclined wall 21c at a portion in contact with the opposed upper lower inclined wall 21c with a predetermined interval in the longitudinal direction. Has been. The upper cylindrical portion 35 is also provided with friction reducing recesses 36 that are recessed so as to be spaced apart from the upper upper inclined wall 21d at a portion in contact with the opposing upper upper inclined wall 21d at the same interval as the lower cylindrical portion 34 in the longitudinal direction. A plurality are formed along.

  The lower cylindrical portion 34 and the upper cylindrical portion 35 are connected by a plurality of connecting portions 37, and an elongated slit 37 a along the longitudinal direction of the slider 31 is provided between the lower cylindrical portion 34 and the upper cylindrical portion 35. Is formed. As the lower cylindrical portion 34 and the upper cylindrical portion 35 of the slit 37a are bent, the distance between the lower lower arc portion 11e of the lower rail 10 and the upper lower inclined wall 21c, and the lower upper arc portion 11f and the upper upper inclined wall 21d, The variation in the interval is absorbed. In addition, a regulation pedestal 37b is formed in the middle portion of the slit 37a from the upper cylindrical portion 35 toward the lower cylindrical portion 34. A fixing projection (fitting portion) 38 or a regulation projection 39 projects from the side of the coupling portion 37 and the regulation base 37b facing the lower side wall 11b toward the lower side wall 11b. The fixed protrusions 38 are set on the connecting portions 37 located at both ends of the lower rail 10, and the restricting protrusions 39 are set on the remaining connecting portions 37 and the restricting pedestals 37 b.

  The fixed protrusion 38 is an L-shaped protrusion, and is inserted into a fixed hole (fitting receiving portion) 13 formed of a through hole that opens in the lower side wall 11b, so that the other end side of the slider 31 is connected to the lower side wall. 11b is fixed. The restricting protrusion 39 is formed of a protrusion having a rectangular cross section, is inserted into the restricting hole 14 formed of a through hole that opens in the lower side wall 11b, and engages with the direction along the wall surface of the lower side wall 11b. The displacement of 31 is regulated.

  In addition, the full length of the slider 31 is set to 1/2 or less of the full length of the shortest lower rail 10 among the various full length lower rails 10 managed by the manufacturer. As a result, the friction reducing means 30 in which the protector 32 is integrally formed with the slider 31 is divided into the front friction reducing means 30F and the rear friction reducing means 30B from the vehicle front end side and the vehicle rear end side of the lower rail 10 into two. It is possible to arrange a pair of front and rear.

  The protectors 32 (the right protector 32R and the left protector 32L) are disposed at both ends of the lower rail 10 in order to protect the seated person's feet from the end surfaces of the lower rail. That is, both protectors 32R and 32L are integrally formed on each one end side corresponding to the front end side of the lower rail of the right slider 31R and the left slider 31L constituting the front friction reducing means 30F, and the rear friction is reduced. Both protectors 32R and 32L are integrally formed on one end side corresponding to the rear end side of the lower rail of the right slider 31R and the left slider 31L constituting the means 30B. The protector 32 of the present embodiment has a left and right lower side wall 11b on the end surface of the lower rail in FIG. 2, a lower lower circular arc portion 11e continuous with the lower side wall 11b, and a part of the lower bottom wall 11a with respect to one end surface. The left and right two parts (the right protector 32R and the left protector 32L) are formed so as to cover.

  The friction reducing means 30 is constituted by the right side member 30R and the left side member 30L in which the slider 31 and the protector 32 are integrally formed. And since the cross-sectional shape of the lower rail 10 is line symmetrical, the front side friction reduction means 30F and the rear side friction reduction means 30B share the same shape member. That is, the friction reducing means 30 is divided into two parts, that is, the front friction reducing means 30F and the rear friction reducing means 30B in the longitudinal direction in a state where the friction reducing means 30 is assembled to the lower rail 10, and one assembly 1a. On the other hand, two sets of members having the same shape are incorporated.

  The drive means 40 is a motor 41 that generates a driving force as a drive source, a speed reduction mechanism 43 that is disposed at one end of each upper rail 20 and reduces the rotational speed of the output shaft 41a of the motor 41, and a state that is rotatable around the axis. The screw shaft 45 that is pivotally supported in the upper rail 20 via the pivot support plate 44 and has a male screw formed around the shaft, and the female screw portion 46a that is provided are screwed into the male screw portion 45a of the screw shaft 45. In the combined state, it is composed of a female screw member 46 fixed to the lower rail 10 with a fixing bolt 50.

  The motor 41 is disposed between the upper rails 20 and is controlled to be able to rotate forward and reverse. The speed reduction mechanism 43 is linked to the output shaft 41a of the motor 41. The speed reduction mechanism 43 includes a plurality of gears (not shown).

  Next, the assembly procedure of the assembly 1a is shown. First, the female screw member 46 into which the screw shaft 45 is screwed is inserted into the lower rail 10, and the female screw member 46 is fixed to the lower rail 10 with the fixing bolt 50. Then, the upper rail 20 is inserted into the lower rail 10. Next, while inserting the slider 31 between the upper rail 20 and the lower rail 10, the fixing protrusion 38 is inserted into the fixing hole 13 and the restriction protrusion 39 is inserted into the restriction hole 14. Next, the shaft support plates 44 are assembled to both ends of the screw shaft 45, and the screw shaft 45 is supported on the upper rail 20. Then, the speed reduction mechanism 43 is linked to the screw shaft 45 while being assembled to the upper rail 20. Further, the output shaft 41 a of the motor 41 is linked to the speed reduction mechanism 43.

  In the above configuration, when the seated person operates the seat slide device 1, the motor 41 is driven, the output shaft 41 a rotates, and the screw shaft 45 rotates via the speed reduction mechanism 43. Since the female screw member 46 that is screwed into the screw shaft 45 is fixed to the lower rail 10, the upper rail 20 that supports the screw shaft 45 together with the seat (not shown) rotates the screw shaft 45 together with the seat (not shown). It moves along the longitudinal direction (vehicle longitudinal direction).

  With such a configuration, the total length of the slider 31 is set to ½ or less of the shortest lower rail 10 in the various lower rails 10 managed by the manufacturer. The slider 31 can also be applied to the longest lower rail 10. As a result, it is possible to cope with the lower rail 10 having various full lengths by using one type of friction reducing means 30, and the parts can be shared.

  Further, by adopting a configuration in which the slider 31 is assembled from the vehicle front end side and the vehicle rear end side of the lower rail 10, unlike the conventional configuration in which the slider 31 is assembled over the entire length of the lower rail, the slider 31 is not easily caught in the middle. As a result, the assembling property is improved.

  And by forming a protector in one end side of the slider 31, it becomes unnecessary to provide a protector separately, and therefore the number of parts can be reduced. Moreover, since the process of assembling the protector 32 separately from the slider 31 is reduced, the assemblability is improved.

  Further, the friction reducing means 30 is divided into two parts, a front friction reducing means 30F and a rear friction reducing means 30B, the front friction reducing means 30F is assembled to the front end side of the lower rail 10, and the rear friction reducing means 30B is attached to the rear of the lower rail 10. As shown in FIG. 5, an area where the slider 31 is not disposed is formed in the central portion of the lower rail 10 by being configured to be assembled on the end side. Accordingly, since the upper rail 20 and the lower rail 10 are disposed at the front sliding contact end and the rear sliding contact end where the upper rail 20 and the lower rail 10 are in sliding contact with each other, it is possible to deal with various lower rails. It is possible to share parts while suppressing backlash between the two.

  Further, the other end side of the slider 31 can be securely fixed to the lower rail 10 by fitting the fixing protrusion 38 provided on the other end side of the slider 31 into the fixing hole 13 of the lower rail 10. Thus, even when the upper rail 20 moves from a position where the sliding contact with the slider 31 is reduced, the slider 31 does not rattle in the vehicle front-rear direction and the vehicle width direction. The generation of abnormal noise can be prevented.

  Since the cross-sectional shape of the lower rail 10 is line symmetric with respect to the symmetry axis X, the slider 31 assembled from the vehicle front end side and the vehicle rear end side can be made the same member, so that further parts can be shared. Can do.

  In the friction reducing means 30 of the present embodiment, the right member 30R and the left member 30L are configured as separate parts. However, the right protector 32R and the left protector 32L of both the members 30R and 30L are formed so as to be integrated. It is also possible to use one part. And by setting it as such a structure, the number of parts which a manufacturer manages can further be reduced.

  In the friction reduction means 30 of the present embodiment, the front friction reduction means 30F and the rear friction reduction means 30B are set to have the same overall length, but the front friction reduction means 30F is reduced to the rear friction reduction. The total length may be different between the front side and the rear side, such as shorter than the total length of the means 30B.

Moreover, although this embodiment demonstrated the structure at the time of applying to an electrically driven seat slide apparatus, it can also be applied to a manual seat slide apparatus and can obtain the same effect.

DESCRIPTION OF SYMBOLS 1 ... Seat slide apparatus 10 ... Lower rail 11a ... Lower bottom wall 11b ... Lower side wall 11c ... Lower upper wall 11d ... Lower inner wall 11e ... Lower lower circular arc part 11f ... Lower upper circular arc part 13 ... Fitting receiving part (fixing hole)
20 ... Upper rail 21a ... Upper ceiling wall 21b ... Upper side wall 21c ... Upper lower inclined wall 21d ... Upper upper inclined wall 31 ... Slider 32 ... Protector 38 ... Fitting portion (fixed protrusion)
X ... Axis of symmetry

Claims (3)

A lower rail extending along the longitudinal direction of the vehicle,
An upper rail movably assembled on the lower rail along the longitudinal direction of the lower rail;
A slider disposed between the lower rail and the upper rail;
A seat slide device comprising a protector that covers an end surface of the lower rail,
The slider is
It is formed with a length of 1/2 or less in the longitudinal direction of the lower rail,
A pair of front and rear are arranged from the vehicle front end side and the vehicle rear end side of the lower rail,
In addition, the seat slide device is characterized in that the protector is integrally formed on one end side corresponding to the end side of the lower rail. The seat slide device according to claim 1,
A fitting portion protruding toward the side wall surface side of the lower rail on the other end side of the slider;
A seat slide device comprising: a fitting receiving portion that can be fitted to the fitting portion on a side wall surface of the lower rail that faces the fitting portion. In the seat slide device according to claim 1 or claim 2,
The lower rail is
A lower bottom wall having a rectangular shape extending in the longitudinal direction of the vehicle;
A lower side wall erected upward via a lower lower circular arc portion constituted by an arc surface from both end edges in the vehicle width direction of the lower bottom wall;
Lower upper wall extending substantially parallel to the lower bottom wall from the upper edge of both lower side walls through a lower upper arc portion constituted by an arc surface toward the opposite lower side wall;
A lower inner wall depending downward from an inner edge of the lower upper wall,
The upper rail is
An upper ceiling wall having a rectangular shape extending in the longitudinal direction of the vehicle body;
An upper side wall that hangs downward from both edges in the vehicle width direction of the upper ceiling wall;
An upper lower inclined wall standing obliquely upward and outward from a lower end edge of the upper side wall;
An upper upper inclined wall standing upright obliquely from the upper end edge of the upper lower inclined wall toward the upper side wall;
The slider is
Between the lower circular arc part and the upper lower inclined wall, and between the lower upper circular arc part and the upper upper inclined wall;
A lower cylindrical portion made of a cylindrical member disposed along the longitudinal direction between the lower lower circular arc portion and the upper lower inclined wall;
An upper cylindrical portion made of a cylindrical member disposed along the longitudinal direction between the lower upper arc portion and the upper upper inclined wall;
A connecting portion that connects the upper cylindrical portion and the lower cylindrical portion;
The protector is
A seat slide device formed to cover at least the lower side wall, the lower lower arc portion, and a part of the lower bottom wall.